Vehicle-spring



' (No Model.)

H. 0; SWAN;

VEHICLE SPRING.

. Patented Feb. 14, 1888.

PETERS. PMlmLilhugr-wlwr. Washington. D (L UNITED STATES PATENT OFFICE.

HENRY C. SWAN, OF OSHKOSH, WISCONSIN.

VEHICLE-SPRING.

SPECIFICATION forming part of Letters Patent No. 377,817, dated February 14, 1888 Application filed July 27, 1887. Serial No. 245,413. (No model.)

. To all whom it may concern:

zen of the United States, residing at Oshkosh,

in the county of Winnebago and State of Wisconsin, have invented certain new and useful Improvements in Vehicle-Springs; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

The special object of my invention is to construct and arrange four springs on a side-bar vehicle, so as to take up jolts and jars on uneven roads without causing any unnecessary oscillation from side to side.

Figure 1 of the drawings is a bottom plan view of my invention applied, and Fig. 2 a similar view in detail of one of the four springs.

In the drawings, A represents the vehiclebottom, carrying the subjacent cross-bars a a a a B is my improved rod-spring, ofwhich four constitute a set, two being placed near the front and two near the rear of the bottom A. In torsion-springs the elasticity is in proportion to the length of spring, other things being equal; hence, in order to get the length and make the vehicle ride easy, I make the coil b on one and a half turn. The next pointwhich Iaim to overcome is the tendency of the springs described in Patents Nos. 225, 334, 212,791, and 338, 586 to twist the shackle-bolt at the point where it is attached to the side bar. This I accomplish by arranging the points of bearhicle-bottom A. The rod is then passed through the boxes D D andturned to a right angle, forming a longitudinal arm, I)", which passes in a straight line to and through the boxes 0 C. Now I give the rod about one and a half turn to form the coil 12, which increases peripherally in an inward and downward direction, so as to take a plane inclined to the bottom A at about forty-five degrees. From the coil b passes the arm I), which carries the eye end I), that is pivoted to the under side of the side bar, F, at f. The bearings at boxes 0 O and the points of suspension at the shackles f from the side bars are in the same transverse plane. The extent of coil gives the required bolt or rivet, E, to the bars a a and to the velength ofspring to insure an easy up-and-down longitudinal arm b placed at right angles thereto and passing loosely through a box, 0, in alignment with its shackle onthe side bar, thecoil b, passing under the arm b and gradually increasing in a plane at about forty-five degrees angle to the vehicle-bottom, and the arm I), provided with the end eye, b, to connect with the side-bar shackle, whereby each spring turns freely in the boxes 0 D, thereby obtaining a greater length'of twist, and consequently greater elasticity, while all tendency to twist the shackle-bolt by'a laterally-oscillating motion is prevented, as set forth.

In testimony whereof I affix my signature in presence of two witnesses. f

.HENRY .O. SWAN. Witnesses:

F. W. HOUGHTON, W. R. BROWNE. 

